Transcript of "Is there an ideal farming system to maximise stored soil water in the Eastern Australian, Vertosol dominated, semi-arid sub tropics? Jeremy Whish"

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Is there an ideal farming system to maximisestored soil water in the Eastern Australian,Vertosol dominated, semi arid sub tropics?Jeremy Whish

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Key Messages • Complex systems analysis does not need to be done with a single complex model • Reducing complex systems to simple messages is useful • A single picture can capture the learning of 1000 simulations • Risk and Variability should be managed at both the farm and paddock(field) levelsCSIRO. Using models to support farmer decision-making

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The value of stored water !CSIRO. Using models to support farmer decision-making

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Accumulation of water between cropsCSIRO. Using models to support farmer decision-making

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Accumulation of water between cropsCSIRO. Using models to support farmer decision-making

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Explore how rotations affect riskCSIRO. Using models to support farmer decision-making

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Explore how rotations affect riskCSIRO. Using models to support farmer decision-making

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In field decisionsCSIRO. Using models to support farmer decision-making

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Conclusion • Was there an ideal crop rotation for the region that maximised yield and minimised risk ? • yes but flexible management is needed in a variable environment • Was simulation modelling the right approach ? • yes but it needs to be combined with simple models.CSIRO. Using models to support farmer decision-making